📋 In This Article
The Earth's interior maintains temperatures exceeding 5,000°C — a virtually inexhaustible clean energy source. India has significant geothermal potential in the Himalayas, Western Ghats, and Deccan Trap, but this resource remains almost entirely untapped.
How Geothermal Energy Works
High-temperature geothermal systems drill into geologically active areas where underground water is heated to 150–350°C by magma. Steam drives turbines to generate electricity. Low-temperature systems (50–150°C) use heat pumps for space heating, cooling, and industrial processes. Direct-use applications include heating greenhouses and spas.
India's Geothermal Resources
India has 400+ identified geothermal provinces with temperatures ranging from 37°C to 98°C at accessible depths. Manikaran (Himachal Pradesh), Puga (Ladakh), Tattapani (Chhattisgarh), and Ratnagiri (Maharashtra) are among the most studied sites. The Puga Valley in Ladakh is considered India's best site for electricity generation.
Current Status and Challenges
India currently has no commercial geothermal power plants. Exploration costs are high, geological data is limited, and competitive pressure from rapidly falling solar and wind costs has reduced urgency. The National Geothermal Energy Mission aims to develop pilot projects at Puga and Tattapani by 2030.
Near-Term Applications
Even without high-temperature electricity generation, low-temperature geothermal heat is viable for many applications in India: space heating in Himalayan areas, greenhouse agriculture, aquaculture, food processing, and direct bathing/spa applications (already informal at many hot spring sites across India).
Conclusion
Geothermal energy is India's most underdeveloped clean energy resource. While it won't replace solar or wind at scale in the near term, its 24/7 baseload potential makes it strategically valuable for India's long-term clean energy security.